from urllib.request import urlopen
from bs4 import BeautifulSoup
import re

html=urlopen("http://en.wikipedia.org/wiki/Kevin_Bacon")
bsObj=BeautifulSoup(html)
for link in bsObj.find("div",{"id":"bodyContent"}).findAll("a",href=re.compile( "^(/wiki/)((?!:).)*$" )):
    if 'href' in link.attrs:
        print(link.attrs['href'])